phpmyadmin configuration problem

I am a newbie and green to the world of Linux. I have installed phpmyadmin however, I am unable to start it. I am not using ISPconfig and I do not have a domain (Is it necessary?). But whenever I try 'http://localhost/phpmyadmin' it gives me a 404 error.

I have tried almost everything with the config.inc.php file that the walkthroughs told me to no avail. So I pull out the error log for apache2 and here it is:

I get the same error with either URI (I am using http://localhost/phpmyadmin). I can see the directory structure with http://localhost in which I have two directories: apache2-default and phpmyadmin (Yes, 'm' and 'a' in smallcaps)